Apparatus for forming concrete foundation columns



Feb.v 16, 1937. 2,071,047

APPARATUS FOR FORM-ING CONCRETE FOUNDATION COLUMNS E. A. SMITH original Filed Ooi. 5, 1955 5 Sheets-Sheet 1 Feb. 16, 1937.

E. A. SMITH APPARATUS FOR FORMING CONCRETE FOUNDATION COLUMNS 5 sheets-sheet Original Filed Oct. 5, 1955 M# es. n ZAM fm/ @A E,

Feb. 16, 1937. E. A. SMITH 2,071,047

APPARATUS vFCR FCRMING CONCRETE FOUNDATION COLUMNS Original lFiled Oct. 5, 1933 3 Sheets-Sheet 3 Patented Feb. 16, 1937 z,

UNITED STATES` APPARATUS Foa FORMING CONCRETE FOUNDATION COLUMNS vEdward A. Smith, Chatham, N. J.,"assignor to Raymond Concrete Pile Company, New N. Y., a corporation of New Jersey York, i

originen application "Ottenere, 1933, s eriaiNu. 692,255. Divided and this application "August 16,1934,7seria1N0.740,041 f uolainls.

This application is a division oi my copending application, Serial No. 692,255, led October 5, 1933, and pertains to improvements in apparatus for forming concrete columns, as'disclosed 1,931,845.

In that disclosure the hole in the ground is sunk by means of an annular drill or core cutter which forms the lower section of the casing for the mold, the upper casing section following the ylower section down into the hole as the drilling proceeds.

The present invention contemplates keeping the upper casing section out of the hole until the lower section comprising the drill has reached the desired depth, then lowering the upper scction into watertight relationship with thelower section so that the hole maybepumped out and inspected, after which the hole `is filled with concrete to form thecolumn, Ythe casing sections being either left in the hole to become part of the column, or withdrawn during or after the pouring of the concrete.

Further and other objects and advantages will be apparent from the specification' and claims, and from the accompanying drawings which illustrate what is now considered the preferred'l embodiment of the invention. l

Fig. 1 shows the annular drill in position after drilling has been finished and before removal of the driving head and shaft.

Fig. 2 is the same as Fig. 1 after the driving head has been removed and the upper section of the casing has been lowered into position on the lower section, the conical guide ring being still attached to the bottom of the upper section.

Fig. 3 is an enlarged detail showing clamps for locking upper and lower casing sections together, and the hoisting cables.

Fig. 4 is a view on line 4-4 of Fig. 3.

Fig. 5 illustrates a modication in which the casing is of reduced diameter with reference to the cutter, the casing and cutter being partially withdrawn.

Fig. 6 is an enlarged sectional view of Fig. 5.

In the drawings (Fig. 1) I0 designates a drill barrel of the type disclosed in the above mentioned Hart et al application. I2 is the drive head and I4 is the hollow drive shaft. The drive head has ears I6, adapted for automatic engagement or disengagement with lugs I8 welded or riveted to a steel ring integral with the drill barrel. The outer shell of the drill is extended upwardly above ring 20 to form a skirt 22 with its upper edge beveled as at 24 and having an in Hart and Schroeder Patent No.

(Cl. (i1- 57) internal circumierentialring 26 having'its upper edge beveled as `atztlvto' form a conical seat.`

Fig. 1 showsthe' above mechanism at the completion of the drilling operation, with the ,hole and drill barrel full of mud,j'orfmudladenpuid` (not shown) which prevents'r caving of the un-' linedhole above the drill, the mudusually 'con` sisting of earth loosenedy by the drill and water fed to the drill. UnderV certain circumstances mud-laden fluidis evenied to 'the drill to act as a cutting agent. .The cutting edge of the drill has penetrated into Erock 30, and the drive head and drive shaft are in operative position.

Fig.y 2|shows'thelayout after head l2 and shaft i4 lhavefbeen removed and the upper section of casing-32'l has been lowered through the mudjf The lower 'end of ca .sing'section 32 is provided withl adetachable sectional conical guide ring 34 secured by bolts 36 toI a steel ringf38 integral with the uppercasing. The lower outer sur-` face of `ring 38 is A:conical asfat 40`to form a conf tinuation of the outer ,conical surface of Y guide ring 34. Set into the outer surface of ring 33, above its'conical portion, is al ring 42 "oi rubber or other resilient packing, It willjfb'e observed that rst 'ring 34,*a'nd. then ringv 38,'eng`ag`e the upper end of skirt `22 to align'casi'ngI section 32 with the drill barrel', the conical vportion" 4i)l of ring 38 Vbeing seated on theconical seat 23 of ring26 andthe beveled edge 24 of the skirt being imbedded in packing ring 42, thus providing a fluid tight joint betweenV the drill barrel and casing 3'2.` i v The mud-laden liuid is then pumped from the casing and drill barrel, after which a man `is lowered into the casing to loosen bolts 36 so that guide ring 34 may be removed. 'I hen any solids which have settled into the drill barrelA are removed and the bottom of'thejhole (usually rock) is cleaned ofi for receivingI the concrete. r The hole may then be lled with concrete to form the column, leaving casing and drill barrel in place, or, if desired, the casing and barrel may be removed.

If removal of barrel and casing is desired, they are iirst clamped together as shown in Fig. 3. The upper surface of ring 38 is provided with sockets or a groove 44 (Figs. 3 and 4) to accommodate lugs 46 of upper clamp jaws 48 to prevent them from slipping out of place when the hoisting strain is applied. The lower clamp jaws 5B are heads of bolts 52 and have inclined lips 54 adapted to engage the beveled lower edge of ring 2B. As many clamping bolts as may be needed are applied as in Figs. 3 and 4 and are clamped tight by means of nuts 56. Hoisting cables 58 are attached to upwardly extending ears 60 integral with upper jaws 48. Then as the concrete is poured or after the pouring is completed, casing and drill barrel are withdrawn from theyhole, -iti-well known-mannen Althoughthadrillgbarrel must always b e'the, full diameter of the hole, the casing above the drill barrel may, under certain conditions, beg,

of less diameter (Figs. andw),A This isilnportant from the st-andpointof' economy,because a single casing may be used with several sizes of drills. To connect the.reduceddiam-l eter casing to a core barrel an adapter-maybe used, having a short full-diameter section 62 with a conical roof S4, to whichis boltedthe.

bottom section 66 of the reducedc-asing; whichneed only be of suicient diameter to permit passage of a man and possibly a pump.

After the drill barrel and casing 66 are pumped out, the.KY mudhremains undisturbed` abovey roof- 64 and around the outside of casing ,66, thereby.. preventing caving. of fthe walls of --the hole.

When the reduced-.diameter Acasing -is used,` the hoisting cables 68may be attached to. ribs r'Hl 4on roof 64, topermit withdrawal of the drill andl the top of said drill when saidcasing lsloweredV through the. hole into` contactgwith said drill,v said sealingl s means ,comprising .a surface..Y on the casing-progressively,.as the concrete 12 is poured.

Itis to be` understoodthat the invention is not limited to thespecii'lc embodimenty herein illustratedand; described, butmay beused in other ways. withoutdeparture from .its .spirit as dened by the following claims.

I claim;

1. In apparatusof the classdescrlbed, in combination, an annular drill, means forsinking said drill into thetground toform ahole in theground, an annular casing, and meansY for automatically sealing thebottom oi.said;,caslng to the topof said drill when saidA casing-is lowered through the hole into. contact with said drill.

2. In apparatus-,of the class described, in; combination, an annular drill, means .for sinking saiddrill into theground to form a hole in the ground, an annular casing, and means ,for'auto. matically sealing. the bottom of said,l casing to upper end of saiddrill adapted to engagea resilient packing ring on the lower endv of said casing.-Y

to engage said seat to form a tight joint therewith.

4. In apparatus of the class described, in combination, an annular drill adapted for forming a hole in the ground, an annular casing adapted tobev lowered onto said drill in the hole to form with the drill a lining for the hole, and means for automatically guiding the lower end of said casing into alignment with said drill during the loweringy operation.

5. n'vIflreinvention set forth in claim 4 in which said'guiding means comprises an annular conicaljttingattahed-to said casing, and a detachable conical ring attached to said tting and adapted'to guide said fitting into the top of said drill.

6. The invention set forth in claim 4 in which saidgdrill-,has an upwardly extending skirt and said guiding means comprises an annular fitting attached to said casing and adapted to make a tight joint with saidY skirt.

7. The-invention set forth in claim 4 in which said drill has an upwardly extending skirt and saidguiding. means comprises an annular fitting attached vto saidcasing and having a resilient packing ring adapted to make a tight joint with said skirt.

8.. In apparatus of thel class described, in combination, anvannular drill adapted for forming a hole in the ground, an annular casing adapted to be lowered onto said drill in the hole to form with the drill a lining for the hole, and means for clamping. said casing and drill together.

9.` In apparatus of the class described, in combination, an-annulardrill ,adapted for forming a hole in the ground, anannular casing of less diameter-than said-drill and adapted .to be` lowered into the hole formed by said drill, and an adapter member for joining the upper end of said drill to the lowerend of said casing.

l0.- Inv apparatus ,of the class described, in comb ination, an annular. drill Vadapted for forming a hole in the ground, an annular casing of less diameter than said drill, means` for attaching the` lower end of saidcasing to said drill, said casing.-extending upwardly from said drill, and means passing downwardly into the hole alongside said casing for withdrawing said drilland said casing from the hole.

ll. In apparatus of the class described, in combination, an annular drill adapted for forming a hole lin the ground, an annular casing of less diameterthan said drill and adapted to be lowered into., thehole. formed by said drill, an adapter member on the. bottom of said casing forautomatically engaging the top of said drill to form atightjoint-therewith, and means engagingsaid adapter for withdrawing said casing and drill from the hole.

EDWARD A. SMITH. 

